I got the US barreled ones put together, 2 of the 3 had the barrel stubs in the barrel parts and they were a bitch to get out. I spent 9 hours doing 3 guns. I will never take another kit like those 2. the stubs would not press out and had to be machined, when they cut tehm the metal got glass hard and it was a real pita.

I use a mandrel to align the parts on the barrels to get them all in alignment. then press the barrel assemblies into the receivers.

when the guns are done, we are still a long way off from being done. after I get the 6 shorty barrels done it will be time to start machining the lowers. there are several operations on them and they take a long time.